<template>
	<el-card>
		<div class="card-header" slot="header">
			<el-page-header @back="goBack" content=""></el-page-header>
			<el-steps :active="activeStep" simple style="width: 75%;">
				<el-step
					:title="item.title"
					:icon="item.icon"
					v-for="(item, index) in steps"
					:key="index"
					@click.native="activeStep = index"
				></el-step>
			</el-steps>
		</div>
		<el-form label-width="80px">
			<div v-show="activeStep === 0">
				<el-form-item label="课程名称">
					<el-input v-model="course.courseName" style="width:60%;"></el-input>
				</el-form-item>
				<el-form-item label="课程简介">
					<el-input v-model="course.brief" style="width:60%;"></el-input>
				</el-form-item>
				<el-form-item label="课程概述">
					<el-input
						style="margin-bottom: 10px;width:60%;"
						v-model="course.previewFirstField"
						type="textarea"
						placeholder="概述1"
					></el-input>
					<el-input
						v-model="course.previewSecondField"
						type="textarea"
						placeholder="概述2"
						style="width:60%;"
					></el-input>
				</el-form-item>
				<el-form-item label="讲师姓名">
					<el-input v-model="course.teacherDTO.teacherName" style="width:60%;"></el-input>
				</el-form-item>
				<el-form-item label="讲师简介">
					<el-input v-model="course.teacherDTO.description" style="width:60%;"></el-input>
				</el-form-item>
				<el-form-item label="课程排序">
					<el-input-number
						v-model="course.sortNum"
						label="描述文字"
					></el-input-number>
				</el-form-item>
			</div>
			<div v-show="activeStep === 1">
				<el-form-item label="课程封面">
					<!--
            1. 组件需要根据绑定的数据进行图片预览
            2. 组件需要把上传成功的图片地址同步到绑定的数据中
            v-model 的本质还是父子组件通信
              1. 它会给子组件传递一个名字叫 value 的数据（Props）
              2. 默认监听 input 事件，修改绑定的数据（自定义事件）
            -->
					<course-image :limit="5" v-model="course.courseListImg" />
				</el-form-item>
				<el-form-item label="介绍封面">
					<course-image :limit="5" v-model="course.courseImgUrl" />
				</el-form-item>
			</div>
			<div v-show="activeStep === 2">
				<el-form-item label="售卖价格">
					<el-input v-model.number="course.discounts" type="number" style="width:60%;">
						<template slot="append">元</template>
					</el-input>
				</el-form-item>
				<el-form-item label="商品原价">
					<el-input v-model.number="course.price" type="number" style="width:60%;">
						<template slot="append">元</template>
					</el-input>
				</el-form-item>
				<el-form-item label="销量">
					<el-input v-model.number="course.sales" type="number" style="width:60%;">
						<template slot="append">单</template>
					</el-input>
				</el-form-item>
				<el-form-item label="活动标签">
					<el-input v-model="course.discountsTag" style="width:60%;"></el-input>
				</el-form-item>
			</div>
			<div v-show="activeStep === 3">
				<el-form-item label="限时秒杀开关">
					<el-switch
						v-model="course.activityCourse"
						active-color="#13ce66"
						inactive-color="#ff4949"
					>
					</el-switch>
				</el-form-item>
				<template v-if="course.activityCourse">
					<el-form-item label="开始时间">
						<el-date-picker
							v-model="course.activityCourseDTO.beginTime"
							type="date"
							placeholder="选择日期时间"
							value-format="yyyy-MM-dd"
							style="width:60%;"
						/>
					</el-form-item>
					<el-form-item label="结束时间">
						<el-date-picker
							v-model="course.activityCourseDTO.endTime"
							type="date"
							placeholder="选择日期时间"
							value-format="yyyy-MM-dd"
							style="width:60%;"
						/>
					</el-form-item>
					<el-form-item label="秒杀价">
						<el-input
							v-model.number="course.activityCourseDTO.amount"
							type="number"
							style="width:60%;"
						>
							<template slot="append">元</template>
						</el-input>
					</el-form-item>
					<el-form-item label="秒杀库存">
						<el-input
							v-model.number="course.activityCourseDTO.stock"
							type="number"
							style="width:60%;"
						>
							<template slot="append">个</template>
						</el-input>
					</el-form-item>
				</template>
			</div>
			<div v-show="activeStep === 4">
				<el-form-item label="课程详情">
					<text-editor v-model="course.courseDescriptionMarkDown" style="width:80%;" />
					<!-- <el-input v-model="course.courseDescriptionMarkDown" type="textarea"></el-input> -->
				</el-form-item>
				<el-form-item label="是否发布">
					<el-switch
						v-model="course.status"
						:active-value="1"
						:inactive-value="0"
						active-color="#13ce66"
						inactive-color="#ff4949"
					/>
				</el-form-item>
				<el-form-item>
					<el-button type="primary" @click="handleSave">保存</el-button>
				</el-form-item>
			</div>
			<el-form-item v-if="activeStep >= 0 && activeStep < 4">
				<el-button @click="activeStep++">下一步</el-button>
			</el-form-item>
		</el-form>
	</el-card>
</template>

<script lang="ts">
import Vue from 'vue'
import { saveOrUpdateCourse, getCourseById } from '@/services/course'
import CourseImage from './CourseImage.vue'
import TextEditor from '@/components/TextEditor/index.vue'
import moment from 'moment'

export default Vue.extend({
  name: 'CreateOrUpdateCourse',
  props: {
    isEdit: {
      type: Boolean,
      default: false
    },
    courseId: {
      type: [String, Number]
    }
  },
  components: {
    CourseImage,
    TextEditor
  },
  data () {
    return {
      activeStep: 0,
      steps: [
        { title: '基本信息', icon: 'el-icon-edit' },
        { title: '课程封面', icon: 'el-icon-picture' },
        { title: '销售信息', icon: 'el-icon-wallet' },
        { title: '秒杀活动', icon: 'el-icon-goods' },
        { title: '课程详情', icon: 'el-icon-document' }
      ],
      course: {
        // id: 0,
        courseName: '',
        brief: '',
        teacherDTO: {
          // id: 0,
          // courseId: 0,
          teacherName: '',
          teacherHeadPicUrl: '',
          position: '',
          description: ''
        },
        courseDescriptionMarkDown: '',
        price: 0,
        discounts: 0,
        priceTag: '',
        discountsTag: '',
        isNew: true,
        isNewDes: '',
        courseListImg: '',
        courseImgUrl: '',
        sortNum: 0,
        previewFirstField: '',
        previewSecondField: '',
        status: 0, // 0：未发布，1：已发布
        sales: 0,
        activityCourse: false, // 是否开启活动秒杀
        activityCourseDTO: {
          // id: 0,
          // courseId: 0,
          beginTime: '',
          endTime: '',
          amount: 0,
          stock: 0
        },
        autoOnlineTime: ''
      }
    }
  },
  created () {
    if (this.isEdit) {
      this.loadCourse()
    }
  },
  methods: {
    async loadCourse () {
      const { data } = await getCourseById(this.courseId)
      let { activityCourseDTO } = data.data
      if (!activityCourseDTO) {
        activityCourseDTO = this.course.activityCourseDTO
      } else {
        activityCourseDTO.beginTime = moment(
          activityCourseDTO.beginTime
        ).format('YYYY-MM-DD')
        activityCourseDTO.endTime = moment(activityCourseDTO.endTime).format(
          'YYYY-MM-DD'
        )
      }
      data.data.activityCourseDTO = activityCourseDTO
      this.course = data.data
    },

    async handleSave () {
      const { data } = await saveOrUpdateCourse(this.course)
      if (data.code === '000000') {
        this.$message.success('保存成功')
        this.$router.push('/course')
      } else {
        this.$message.error('保存失败')
      }
    },
    goBack () {
      this.$router.push('/course')
    }
  }
})
</script>

<style lang="scss" scoped>
.card-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
}
.el-step {
	cursor: pointer;
}
</style>
